Insulating material and method of manufacturing same.



PATENTBD FEB. 12, 1907.

G. KELLY. INSULATING MATERIAL AND METHOD OF MANUFAGTURING SAME.

APPLIOATIOH FILED APB.24,1906.

7 To whom, it may concern} UNITED STATES PATENT OFFICE.

GEORGE KELLY, OF HINSDALE, ILLINOIS.

. Nu B98189.

Be it known that 1, GEORGE KELLY, a citizen ofthe United States, residing at Hins:

dale, in the county of Dupage and State of Illinois, have invented a new and useful In V sulating-Material-and Method of Manufac- 'turing' Same, of which the following is a s citieation.

his invention relates to the method of manufacturing insulating material'and the like, as well as the article produced by such method.

The principal object is to produce a highlyefficient insulating article from printed-paper stock, which can now be purchased at very small cost compared to the cost of unprinted paper, even of the same grade. The invention is primarily based on the discovery that the inks employed in'printing contain ingredients which can be softened and made to flow in order to coact as a binder and vulcanagent in cementing the sheets together and ardening the same to produce an article highly eflicient as an insulator, said article be1ng-fire and damp roof and capable of withstanding high mec anical stress or strain.

In carrying out the invention sheets of printed mattersuch as newspapers, ma azines, and other periodicals, posters, bills, and the likecomprising paper sheets having printers inks and colors thereon, are thoroughly moistened with a vulcaniiing liquid. This liquid may perhaps be c posed of a variety of ingredients; but that which so far discovered has given the greatest satisfaction in actual practice is a composition set forth in a copending application and comprising liquid glass, preferably sili eate of sodium in liquid form, white lead, sulfur, and rubber. Ninety-five parts of silieateflof sodium are em loyed with about five parts of flowers of sul ur, ten to fifteen parts of rubber, and five parts of white lead. These in edients are measured by weight and are thoroughly intermixed in any well-known manner, so that they form an even and perfect-mixture, The white lead, however," is

- not'essential and may or may not be em- PlO F'Od; as desired.

he vulcanizing compound may be a plied to the sheets in a variety of ways-as, For instance, 'by'brushing-said sheets therewith or by dipping the sheets into the compound and Specification of Letters Patent. Application flied April 24, 1906. Serial No. 813.427.

Q rateat areb. 12, 1907.

afterward placing them one upon the other to form a body. The dip ing method is perhaps preferable and may be accomplished in the following manner, reference being had to the accompanying drawings, wherein the dif ferent steps are disclosed in a diagrammatic manner.

-]igure 1 of said drawings is a sectional view showing the first'step. Fig. 2 illus- Hates the draining of thebody; l ig. 3, the preliminary drying or setting of the same; F i 4, the pressing operation, and Fig. 5 the vu canizing step.

A vessel, as 10, having a perforate bottom, is partially'submerged in a body 11 of the liquid com ound, and the sheets are piled one upon t e other in the vessel, being thus successively submerged and impregnated with the compound. When the body of sheets 12 of the desired thickness has been made, the vessel is elevated from the liquid, as'shown in Fig. 2, and the surplus allowed to drain therefrom. The body 12 of saturated sheets is then placed 11 on a screen, as 13 in Fig. 3, and the composition allowed to partially dry or set, after which said body 12 is pressed by any suitable means, (illustrated diagrammatically at 14 in Fig. After the pressing operation the compacted body 12 is placed in a vulcanizing-press (shown diagrammatically at 15 in Fig. 5) and is vulcanized under pressure and moderate eat. 5 l

The resultant sheet is an electrical insulator slab, board, or the like having a very high degree of efficiency, samples having withstood a test of fifteen thousand volts without breaking down. A further and imortant feature is that the resultant product 15 both fire and moisture proof and is capable of withstanding high mechanical strain, so that the continued use will not affect its efficienc This is an exceedin im or- These inks ine ude varnishes, shellac, various kinds of pitches, asphaltum, mucilages, soaps, and various sulfurs, sulfite of iron and copper, different kinds of oils, an d the likhso uniform in thickness. Therefore if these sheets are spread out flat and laid one upon the other they will form a comparatively large board. If doubled, a board of a differcut size is made and there is no necessity of cutting the material. While the article is capable of other uses than insulating purposes, it is highly eflicient for the latter, not only for the reasons set forth, but also-because it is not frangible or liable to .crack and can then be successfully employed about dynamos and electrical machinery, as it is not dcleteriously affected by the jars and vibrations thereof. It is moreover capable of a high polish, so that it may be made very ornamental.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, isa 1. That improvement in the process of manufacturing insulating articles, which consists in impregnating material having prin tors ink thereon with a vulcanizing-binder, and vulcanizing. the composition.

2. That improvement in the process of manufacturing insulating articles, which consists in impregnating printed sheets with a binder that frees the inks in said sheets, and afterward vulcanizing the sheets.

3. That improvement in the process of manufacturing insulating articles, which consists in impregnating paper sheets having rinters ink thereon with a vulcanizingbinder, and then vulcanizing the same.

4. That improvement in the process of manufacturing insulating articles, which con- 1 sists in pressing and vulcanizing a body of material having printers ink thereon and impregnated with'a vulcanizin -binder.

5. '1 hat improvement in t e process of manufacturing insulatin articles,which consists in pressing and vu canizing a body of printed sheets that is impregnated with a binder which acts on the print in said sheets.

61 That improvement in the process of manufacturing insulating articles,which con: sists in reducing abody of layers of superposed slieets having printers ink thereon and that is impregnated with a vulcanizingbinder, and pressing and vulcanizing the body.

7 That improvement in the process of manufacturing insulating articles,which consists in producing a body of printed material having an alkali incorporated therein, and pressing and vulcanizing the body.

8. That improvement in the process of manufacturing insulating articles,which consists in producing a body of printed material having a vulcamzingagent and an alkali incorporated therein, and pressing and vulcanizing said body- 9. That improvement in the process of manufacturing insulating articles,which con: sists in moistening sheets, having printers ink thereon, with vulcanizing material that includes a vulcanizing agent and an alkali, forming said sheets into a body, and pressing and vulcanizing the body.

10. That improvement in the process of manufacturing insulating articles,which consists in forming a body of printed material having incorporated therein a 'vulcanizing material that includes rubber and liquid glass, and pressing and vulcanizing the body.

11. That improvement in the process of manufacturing insulating articles,which corisists in inoistening sheets of printed material with a vulcanizing materialthat includes rubber and liquid glass, forming said sheets into a body, and pressing and vulcanizing the body.

12. That improvement in the process of manufacturing insulating articles,which consists in laying printed sheets one upon the other in a vulcanizing compound,.removing the body of sheets from the, compound, and vulcanizing the same.

13. That improvementin manufacturing insulating articles, which consists in impregnating sheets with a compound comprising liquid glass, rubber and sulfur, forming the sheets into a body, pressing the body, and finally vulcanizing the same.

14. As an article ofmanufacture, a body comprising a vulcanized composition of matter having printers ink thereon, and aibinder.

15; As an article of manufacture, a v dcanized body, comprising layers, ofsheets' having printers ink thereon, and a vulcanizingbinder.

16. As an, articleof manufacturegja vulcanized body, comprising layers .offprinted .the process of sheets, anda vulcanizing binder, includingan alkali. V r 17. As an article 9f manufacture; a vulcanized body compr singlayers of printed 'sheets,and a vulcanizing-binder comprising rubber and liquid lass.

18. As an artic e of manufacture, a vulcanized body comprising layers of printed sheets, and a vulcanizing-binder comprising sulfur, rubber andliquid glass.

19. That improvement m he process-of manufacturing msulating articles, which con- 'sists in imgregnating' material having printers ink t ereon, with a vulcanizing-binder.

20. That imprqvement in the process of manufacturing Insulating artic1es,which consists in im regnating material having printers ink thereon, wlth a vulcanizing-blnder that frees and becomes incorporated with the materials of said ink.

V In testimony that claim the foregoing as my own I have hereto affixed my signature 1c in thf presence of two witnesses.

GEORGE KELLY.

Witnesses:

JOHN H. SreeERs, 'BLA CH J. KALDENBACK. 

